Andoid Manifest Editor: Adjust look to be more in line with a editor

Use the same styling as e.g. the submit editor.

Change-Id: Idb396b6971f75d9f4a876edf992c917ee81820df
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@digia.com>
AndroidManifestEditor: Readd some tweaks from the .ui file

Fx the version code spinbox being too big and readd some tooltips.k

Change-Id: I6e2e10d64d9616809f3b97c8c9a5d1e668c025ea
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@digia.com>
AndroidManifestEditor: Disable text actions if the editor is hidden

Change-Id: Iac60829f9db5d425c70f7ff7a1124ec33f2d5173
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@digia.com>
AndroidManifestEditor: Use indent 4 for formatting source

Change-Id: Iece75754acafda7c3bcaa8fe043a2aae98ef7e32
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@digia.com>